Hi Kb thank you very much for your help.I have seen the entire video which you have redirected me in youtube.The video describes the overview of mainframe and for what work it is best suited.In short it describes how to get the data->process the data->produce output.but I want the inside view about the COBOL MAINFRAME JCL CICS.In simple I want the video tutorials that gives the detailed information of all the above.starting from bascis,programming(how to use COBOL JCL CICS ) along with mainframes.